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-rw-r--r--sleekxmpp/xmlstream/xmlstream.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/sleekxmpp/xmlstream/xmlstream.py b/sleekxmpp/xmlstream/xmlstream.py
index 4e5e2fe4..216c0ed3 100644
--- a/sleekxmpp/xmlstream/xmlstream.py
+++ b/sleekxmpp/xmlstream/xmlstream.py
@@ -147,6 +147,8 @@ class XMLStream(object):
#: client certificate to use for authenticating via SASL EXTERNAL.
self.keyfile = None
+ self._der_cert = None
+
#: The time in seconds to wait for events from the event queue,
#: and also the time between checks for the process stop signal.
self.wait_timeout = WAIT_TIMEOUT